Short-turning gear.



A. BJERKAAS.

SHORT TURNING GEAR.

APPLICATION FILED IAN-24. 19!].

6 w 3 $6 M- A9 wam Patented Apr. 1, 1919.

i *To allcohom it may concern: Y

a Bejit known that L ARNoLnBanmrAM, a .citizen of the United States,residin at 'L'ong Prairie, in-'thelcounty of-Todd,qtato ail li oyskilledinthe art to w i it aPPertains to make and use the same.

Thisinvention relates to improvements in runninggear and particularly toshort turning gear for-large and heavy vehicles and i machines.

Y. p One object of the present invention is to 7 provide a novel andsimple device of this jlj character whereby the rear wheels of a heavy jmachine, such as a threshin machine, can be turned to permit the machinetobe ma.-

nipulated within a short space.

Another object is to provide a device of flthis character which Wlll notbe liable to displacement or derangement, and which will not operate ofitself.

e Other objects and advantages will be ap- 1 parent from the followingdescription when taken in connection with the accompanying drawing.

3 0 In'the drawing: Figure 1 is a top plan view of the running gearequipped with my invention. F1g. 2 is a sectional view taken on the line22 .of Fig. 1.

-""w-Fig.f3 is a sectional view taken on the line3-3 of Fig. 1. v

Fig. 4 is a sectional line H of Fig. 1.

Referring particularly to the accompanying drawing 10 represents thefront axle of the runninggear,11 the rear axle, and 12 a the stub axleswhich. are pivoted on the ends w of the rear axle, as shown at 13.Extendingforwardly of the axles 12, and forming integral parts thereof,are the arms 14:, [,whilesimilar arms 15 extend rearwardly therefrom, atpoints directly in rear of the first arms. The ends of these arms areview taken on the i inthe plan view, Fig. 1. On each side of the centerof therear axle, and forwardly and rearwardly thereof, are the brackets17, in each of which is mounted a grooved ing arms 15.

formed with openings 16, as clearly seen 1 {orrr DsTATE FATENT orrroni.

Specificationofietterslatent. Patented Apr.1,1919. A pplication filedJanuary 24,1917. Seria1 No.-144.,199.

the center of which is formedan opening 20 for the passage ofthe kingbolt 21. Rotatably disposed on this plate is a second circular. plate22,"also-formed with an opening 23 for the bolt 21. On the upper late,and secured thereto and to the vehic e or machine, is a block 24.Secured to this block is a casting 25, provided with the bear.- ing eyes26 for the reception of the shaft 27 which extends forwardly to a pointwithin convenient reach for steering Where it is provided with a crankhandle 28 for turning the shaft. Mounted in the ears 29 of the castingis a shaft 30, carrying thereon a worm wheel 31, which meshes with theworm 32 on the adjacent end of the shaft 27. Rigidly secured to the wormwheel is a grooved'drum 33 around which the intermediate portion of acable 3-1 is passed a couple of turns. The ends of this cable extendrearwardly from the drum and engage around the rear rollers 18 and thentoward the ends of the rear axle where they are secured in the eyes ofthe rearwardly extend- Secured to each portion of the cable, at pointsintermediate the axles, are cables 35 each one of which passes aroundone of the pulleys or grooved wheels 18, and is connected to an eye inone of the forwardly extending arms 14.

Thus when the shaft 27 is turned in one direction, by means of the crankhandle, one end of the cable 31 will be pulled and the other endslackened, while one of the cables 35 will be correspondingly pulled andthe other one slackened, thereby swinging one of the stub axlesforwardly and the other one rearwardly. The size of the are throughwhich the stub axles are swung will govern the arc of movement of therear of the vehicle or machine, and the space in which the same can beturned. The worm wheel and worm cannot be moved by any pulling directlyfrom the cables, thus insuring the perfect stability and rigidity of thestructure.

The ear can be easily and conveniently manipulated from the driversseat, and is readily adaptable for use on ordinary road vehicles, or forheavy vehicles such as tractilon engines, threshing machines, and the lire.

WVhat is clainied is:

A short turning gear including a front axle and a rear axle, stub axlesmounted for pivotal movement on the ends of the rear stub axles havingforwardly and're'arwardly extending arms, a cable having its ntermediate'pO'IUOn' engaged several times around the drum and having-its-endsengaged around certain of the grooved wheels *ilndconnectedato certainofthearms of the stub axles, additionalscables connected to the remainingarms and engaged around the remaining groovedwheels and being secured toportions=of the firstieable, and means for rotating the said drum.

"In testimony whereof, I aflix my signature, in the presence of twowitnesses.

ARNOLD BJ'DR'KAAS.

Witnesses:

HELEN SMITH, L. J. RAMSTOD.

Oopies oi thispateixt-may be-obtaind for five cents each,nyxaddressingwhe Commissioner eof iatents,

. WashingtongD. 0.

